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Pepsi [2]
3 years ago
11

Which of these equations are correct? Select three that apply.

Mathematics
1 answer:
andriy [413]3 years ago
8 0
Assuming your 10N are all intended to be 10^N, equations B, D, F are correct.

___
Your calculator can help you with this.
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4cos^2(x)-7cos(x)+3<br> Please help and explain how you did it :)
dangina [55]

I assume you're asked to solve

4 cos²(<em>x</em>) - 7 cos(<em>x</em>) + 3 = 0

Factor the left side:

(4 cos(<em>x</em>) - 3) (cos(<em>x</em>) - 1) = 0

Then either

4 cos(<em>x</em>) - 3 = 0   <u>or</u>   cos(<em>x</em>) - 1 = 0

cos(<em>x</em>) = 3/4   <u>or</u>   cos(<em>x</em>) = 1

From the first case, we get

<em>x</em> = cos⁻¹(3/4) + 2<em>nπ</em>  <u>or</u>   <em>x</em> = -cos⁻¹(3/4) + 2<em>nπ</em>

and from the second,

<em>x</em> = <em>nπ</em>

where <em>n</em> is any integer.

7 0
3 years ago
What two numbers can you multiply to get 84?
svet-max [94.6K]
84 ÷ 2 = 42

Check it to make sure.

2 × 42 = 84

42 and 2 can be multiplied to get 84.
7 0
3 years ago
Eileen drove for 85 minutes. This is 21 more minutes than one third the number of minutes Ethan drove. How do I put this into an
Lapatulllka [165]
So let's start out by labeling Ethan as X

Since 85 is 1/3 of what Ethan drove, that means Ethan drove 3 times of 85.

85= (3x) -21                                 
85 -21 = 3x
60=3x
20 = x 
6 0
3 years ago
Read 2 more answers
Help with this problem pleaseeee
RUDIKE [14]

Step-by-step explanation:

(16 ×7×3)+(1/2×3×5×6)

=336+45

=381cubic inch

3 0
3 years ago
PLEASE HELP I WILL GOVE BRAINIEST
Elza [17]

Answer: the answer is x<-4 so the correct answer choice would be D

Step-by-step explanation: Hope this helps :)

7 0
2 years ago
Read 2 more answers
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